Current seroepidemiological status of hepatitis A with a comparison of antibody titers after infection and vaccination

The overall prevalence of anti-hepatitis A virus antibodies was 49.6% in 385 inhabitants in Hondo City, Japan in 1991. An approximately 50% prevalence rate occurred between 40 and 49 years of age. The prevalence of anti-HAV antibodies was significantly lower in 1991 than in 1982 in the age groups 20 to 29 years and 30 to 39 years ( p